Andrew Solutions. FlexTwist. Waveguide Components

Transcription

1 Andrew Solutions FlexTwist Waveguide Components

2 FlexTwist Waveguide Components What is the value of low-loss, high-performance waveguide? In a word: inestimable. Your waveguide is a critical link in point-to-point and point-to-multipoint digital radio links. Its value, however, is not absolute. Every RF microwave environment is unique. The only true measure of the value of your waveguide is how well it performs within the context of your individual system. Does it provide an exact match physically, electrically, and environmentally? With more than 900 flexible waveguide configurations, CommScope FlexTwist waveguide components provide an optimum solution for virtually any application. Each FlexTwist waveguide component is engineered to provide exceptional low-loss electrical performance, plus fast, accurate installation for your most challenging environments.

3 Core construction The FlexTwist waveguide core is created by helically winding a silver coated brass strip to form a continuous, uniform rectangular tube. A solder fillet is then wound around the core, creating a seal that eliminates RF and pressure leakage. A protective neoprene jacket provides additional mechanical support. Excellent performance for environment FlexTwist waveguide components provide excellent vibration isolation and eliminate many of the installation problems caused by misalignment. Recognized for the ability to aid in positioning and aligning parabolic reflectors in line-of-sight microwave radio links, FlexTwist waveguide components are used in a variety of military and commercial applications. FlexTwist waveguide is designed and tested for applications ranging from 3.3 to 40.0 GHz and are available in a variety of lengths, from mm (12 48 in). FlexTwist waveguide components are available with American or European standard flanges, making them suitable for a wide variety of applications. All FlexTwist waveguide components are manufactured and tested at CommScope s ISO certified facilities. Controlled construction of the core results in an ideal form that provides repeatable return-loss and insertion-loss performance during flexing. Precision manufacturing enables CommScope to produce FlexTwist waveguide at frequencies up to 40 GHz. FlexTwist Waveguide Core highlighting the solder fillet Jacketing A neoprene jacket provides environmental and mechanical protection to the precision performance core and enhances overall mechanical support. The jackets are highly resistant to oil, other fluids and ozone attack. This outer protective layer is vulcanized to the waveguide using thermal compression to support the convolutions during flexing. CommScope offers a neoprene protective covering to suit most needs. Flanges A full range of flange styles are available with each waveguide size as defined in the table. Flanges are offered to IEC-R and American E.I.A. WR specifications in brass material.

4 Design Characteristics Average power Average power handling is estimated based on figures derived from the peak power ratings indicated in IEC 636. All high-power performance specifications in this document have been calculated from existing data and are offered for advice only. Peak power The peak power handling capability is based on data published in IEC 636 for the lower end of the designated frequency band. It represents the theoretical breakdown value at a frequency of 1.5 times cut-off. It assumes that breakdown in dry air and at normal temperature and pressure (N.T.P.) occurs at 30,000 V/cm. It also assumes a power safety factor of 2.25 and a voltage reflection factor of 0.2 (VSWR = 1.5) in the system under test. The duty cycle must be less than The values provided in the tables are for information only. Humidity and environmental characteristics Environmental Characteristics Operating Temperature Range Fluid Resistance Environmental Resistance -55 to +100 c Oil, Ozone Good Humidity, in general, will not affect a flexible waveguide. However, low surface temperatures may cause condensation, which can penetrate non-sealed flanges through capillary action. Non-jacketed flexible waveguide is also prone to condensation. Long sections of waveguide should be sealed or regularly purged with dry air. When deployed in humid environments, a static desiccant or DryLine dehydrator should be used to prevent moisture development. FlexTwist waveguide is considered suitable for use in most environments, provided it is fitted with the standard neoprene jacket. Vibration Vibration of the flexible waveguide should be kept to a minimum if the unit is in a stressed (tensile) condition, as the rubber jacket may become more susceptible to ozone and environmental damage.

5 Design application, installation and handling instructions FlexTwist waveguide components are not designed to be dimensionally equivalent to rigid waveguide, but they are designed to be electrically equivalent and compatible with the equivalent waveguide size. FlexTwist waveguide components maintain return-loss and insertion-loss performance through flexing. Due to its design, FlexTwist cannot be considered phase stable when flexed, since this will alter the electrical length of the assembly. RF power can be transmitted across the entire band of the equivalent rigid waveguide size. Narrow bandwidth FlexTwists are available in some frequency bands in order to provide improved return loss performance. In handling any FlexTwist waveguide component, particular attention must be paid to the minimum bend radius, per the specifications. FlexTwist waveguide assembly lengths FlexTwist waveguide components are available in a variety of standard lengths, from mm, as shown in the specifications. The assembly length is the measured distance between the front face of both flanges. The standard recommended lengths represent a ±3% manufacturing tolerance. Static bend radius Static bend radius is the minimum bend that an assembly may be subject to without repeat movement (except as a consequence of small vibrations or axial expansions). CommScope designs FlexTwist waveguide with additional support at the flange to the flexible joint. However, care should be taken not to subject the back of the flange to the minimum static bend radius. Testing All CommScope FlexTwist waveguide components are tested for insertion-loss and return-loss swept over the stipulated frequency band. Flexible waveguide is generally used to compensate for mechanical misalignment and thermal expansion, to facilitate installation and to decouple the effects of vibration. Flexible waveguide is not as robust as its rigid counterpart where excessive internal or external pressure can markedly altar the return loss. Long lengths of flexible waveguide are not recommended over elliptical or rigid waveguide due to the inherently higher attenuation values. Design Characteristics 5

6 Ordering information The examples below describe the ezguide numbering for flexible waveguide: Product Waveguide Flange A** Flange B** Frequency Length Code Size Code Code Code Code Code F 137 C C S I Description: WR137 Flange A is Flange B is Frequency of GHz Length is Flex Twist a CPR137G a CPR137G mm/12 in 1 = 300 (12) 2 = 600 (24) 3 = 900 (36) 4 = = 1200 (48) *Inches are for reference only. Code Flange Type* Description Available for Waveguide Size Codes B UG-Cover Through Holes, No Gasket or Choke Grooves, Square Flange 028, 042, 062, 075, 090, 112 C CPR( )G Through Holes, Gasket Groove, Rectangular Flange 090, 112, 137, 187, 229 E CMR Alternate Tapped Holes, No Gasket Groove, Rectangular Flange 090, 112, 137, 187 H PDR Through Holes, Gasket Groove, Rectangular Flange 062, 075, 090, 112, 137, 187, 229 K PBR Through Holes, Gasket Groove, No Choke, Square Flange 028, 034, 042, 062, 075, 090, 112 L UDR Through Holes, No Gasket Groove, Rectangular Flange 062, 075, 090, 112, 137, 187, 229 M UBR Through Holes, No Gasket Groove, No Choke, Square Flange 028, 034, 042, 062, 075, 090, 112 ** Enter Flange Codes in alphabetical order (e.g. F042 ABS1) Size Waveguide Frequency EIA RCSC IEC Code Code (GHz) WR28 WG22 R S A WR34 WG21 R S WR42 WG20 R S WR62 WG18 R S WR75 WG17 R S WR90 WG16 R S B WR112 WG15 R S C WR137 WG14 R S B C D WR187 WG12 R S A WR229 WG11A R S A

7 Ordering information The Jacket A jacket will provide environmental and mechanical protection to the precision performance core as well as mechanical support. Andrew offers a neoprene protective covering to suit most needs. The neoprene jacket is vulcanized to the waveguide using thermal compression techniques. These vulcanized jackets provide support to the convolutions during flexing. The jackets are resistant to oil and other fluids and have a high resistance to ozone attack. Flanges A full range of flange styles are available with each waveguide size as defined in the table. Flanges are offered to IEC-R and American E.I.A. WR specifications in brass material. Environmental Characteristics Operating Temperature Range Fluid Resistance Environmental Resistance -55 to +100 c Oil, Ozone Good FlexTwist Sections VSWR 1 Max Min Min Attenuation Average Peak Twist E-Bend H-Bend Pressure Frequency 900 mm 1200 mm db/m Power Power deg/m Radius Radius lb/in EIA RCSC IEC (GHz) (12-36 in) (48 in) (db/ft) watts kw (deg/ft) mm (in) mm (in) (kpa) WR28 WG22 R On Request On Request 3.28 (1.00) (155) 38 (1.5) 76 (3.0) 45 (310) WR34 WG21 R (0.90) (155) 38 (1.5) 76 (3.0) 45 (310) WR42 WG20 R (0.80) (155) 38 (1.5) 76 (3.0) 45 (310) WR62 WG18 R (0.30) (135) 52 (2.0) 102 (4.0) 45 (310) WR75 WG17 R (0.18) (110) 64 (2.5) 115 (4.5) 45 (310) WR90 WG16 R (0.13) (95) 64 (2.5) 127 (5.0) 45 (310) WR112 WG15 R (0.12) 1, (80) 76 (3.0) 152 (6.0) 35 (240) WR137 WG14 R (0.09) 2, (65) 102 (4.0) 204 (8.0) 30 (205) WR187 WG12 R (0.05) 3,000 1, (50) 165 (6.5) 330 (13.0) 30 (205) WR229 WG11A R (0.04) 4,000 1, (40) 165 (6.5) 330 (13.0) 30 (205) Notes 1. VSWR figures are based on plain flanges. Degraded figures can be expected with choke flanges. For additional information For additional information on the complete selection of FlexTwist waveguide components, visit the Andrew ecatalog at.

8 Looking for the Andrew flash? We re proud to be a part of your network s story. Here at CommScope, we embrace our role as a trusted resource, partner, and facilitator. We create the infrastructure that connects the world and evolves with every advance in technology. By investing all of our capabilities, resources, relationships, and products into your toughest challenges, we continue our long history of solving problems together paving the way for new ideas and fresh ways of thinking. We re a trusted resource and partner around the world because we re invested in you: your people, your networks, your success. It inspires us to build relationships and infrastructure connect people and technologies across protocols, oceans, and time zones and share what we learn along the way. We ll never stop connecting and evolving networks for the business of life at home, at work, and on the go. This is our promise to you. This is CommScope. As a valued Andrew Solutions customer, we d like to thank you for your loyalty and business. As we celebrate 75 years of the Andrew brand, we realized that many customers have come to see the Andrew flash logo as synonymous with our long history of high-quality wireless solutions, dedicated service, and industry-leading innovation. 75 YEARS The Andrew flash logo has changed. Our commitment to you is as strong as ever. Over the years, our logo has evolved, just as our portfolio has evolved to better meet your network needs. As you may know, Andrew Solutions was acquired by CommScope in While CommScope serves many customers across multiple geographies and markets, some customers didn t realize the full breadth of our solutions. We soon realized that to tell a more unified story about who we are and what we do, we would need to better integrate the Andrew portfolio of wireless solutions into the CommScope brand. So while you may no longer see the Andrew flash and colors on our letters, statements or products, you can still rely on the same strong tradition of Andrew quality, service and innovation you ve come to expect only now under the CommScope name and our new dynamic logo Visit our website or contact your local CommScope representative for more information CommScope, Inc. All rights reserved. All trademarks identified by or are registered trademarks or trademarks, respectively, of CommScope, Inc. This document is for planning purposes only and is not intended to modify or supplement any specifications or warranties relating to CommScope products or services. BR EN (09/12)